|Quadrangle map, 1:250,000-scale||CH|
|Quadrangle map, 1:63,360-scale||B-6|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Rainbow Gulch is a north- and west-flowing tributary to the Middle Fork Koyukuk River and is located 2 to 3 miles northwest of Minnie Creek Lake. Reed (1938) described Rainbow Creek as running a little north of west, which would coincide with the lower part of the creek. The reference point for the prospects on this creek thus has been plotted near a cabin shown on the topographic map on the lower part of the creek (sec. 35, T. 31 N., R. 11 W., of the Fairbanks Meridian). The location is accurate within a 1-mile radius.|
Geologic descriptionReed (1938, p. 30) reported that the creek had good prospects and speculated that the creek would be a producer, given improved freight rates to the area. Mapping shows the creek to drain an area underlain predominantly by Devonian siltstone and grit (Brosgé and Reiser, 1964). No other information is available
|Geologic map unit||(-149.952746669526, 67.4695790599402)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a)|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary.|
|Indication of production||None|
Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Chandalar and Wiseman quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-340, 205 p.
Cobb, E.H., and Cruz, E.L., 1983, Summaries of data and lists of references to metallic and selected nonmetallic mineral deposits in the Chandalar quadrangle, Alaska: U.S. Geological Survey Open-File Report 83-278, 91 p.
DeYoung, J.H., Jr., 1978, Mineral resources map of the Chandalar quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-878-B, 2 sheets, scale 1:250,000.
Mulligan, J.J., 1974, Mineral resources of the Trans-Alaska Pipeline corridor: U.S. Bureau of Mines Information Circular 8626, 24 p., 9 sheets, scale 1:250,000.
|Reporters||J.M. Britton (Anchorage)|
|Last report date||11/17/1999|